MAre you headed for college?Choosing the right type of chi-square testNoGoing to college?YesChi-Square Test: Student, TeacherExpected counts are printed below observed countsChi-Square contributions are printed below expected countsStudentTeacherTotal1420.5-Student2.06136-PROBLEM:A curious AP® Statistics student wondered if students in her high school would responddifferently to a teacher than to a student when asked about their intention to go to collegeafter high school. One hundred students from her high school volunteered to participate inan experiment, and they were randomly assigned to have either a student or a teacherinterview them. This two-way table summarizes the data.InterviewerTeacher2720.52.061400-Yes1427No3623Total5050100Assume that the conditions for performing inference are met. Minitab output for a chi-square test using these data is shown.2329.51.43250200-Total416SKILLS 1.E, 4.E.Total4159•591002040608029.51.43250Chi-Sq = 6.986, DF = 1, P-Value = 0.008(a) Should a chi-square test for independence or a chi-square test for homogeneity be usedin this setting? Explain your reasoning.(b) State an appropriate pair of hypotheses for researchers to test in this setting.100OBFW High School Publishers 2020(c) Which cell contributes most to the chi-square test statistic? In what way does this celldiffer from what the null hypothesis suggests?(d) Interpret the P-value in context. What conclusion would you draw at a=0.01?with ajal

The Chi-square test for homogeneity is essentially assumed to validate if two or more multinomial…

Answered: (a) Should a chi-square test for…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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test the given claim. Identify the null hypothesis, alternative hypothesis, test statistic, P-value or critical value(s), conclusion about the null hypothesis, and final conclusion that addresses the original claim. Bednets to Reduce Malaria In a randomized controlled trial in Kenya, insecticide-treated bednets were tested as a way to reduce malaria. Among 343 infants using bednets, 15 developed malaria. Among 294 infants not using bednets, 27 developed malaria (based on data from “Sustainability of Reductions in Malaria Transmission and Infant Mortality in Western Kenya with Use of Insecticide-Treated Bednets,” by Lindblade et A., Journal of the American Medical Association, Vol. 291, No. 21). We want to use a 0.01 significance level to test the claim that the incidence of malaria is lower for infants using bednets. a. Test the claim using a hypothesis test. b. Test the claim by constructing an appropriate confidence interval. c. Based on the results, do the bednets appear to be…
- What is the z-value? -What is the z-value? -What is the p-value for two-tailed hypothesis? -What is the result of the hypothesis after the z-test? -What is the result of the hypothesis after the z-test?
A decade-old study found that the proportion of high school seniors who felt that getting rich" was an important personal goal was 66%. Suppose that we have reason to believe that this proportion has changed, and we wish to carry out a hypothesis test to see if our belief can be supported. State the null hypothesis H. and the alternative hypothesis H, that we would use for this test. Ho: H OSO Submit Assignmen Privacy Accessibili Continue O 2021 McGraw-Hill Education. All Rights Reserved. Terms of Use revious
Using the information obtained from a study on heart rate, the following data were obtained for the hypothesis test: • A doctor is testing the claim that the average heart rate of patients is less than 70 bpm. • Assume the significance level is a = 0.05. • The z- test statistic is calculated as -2.01. What is the p-value and conclusion for this hypothesis test? Move the blue dot to choose the appropriate test (left-, right, or two-tailed). Use the graph below to move the slider to he test statistic in order to find the p-value. Then, make a conclusion based on those results.
Survey Methods - Question 21 The particular question is related to Lean Six Sigma Black Belt (MindPro) covering Survey Methods. Please thoroughly understand the relevant image, and accurately confirm whether the mentioned statement is TRUE or FALSE, by, clearly providing a Justification/Working.
You are a manufacturing engineer with a machine company. The company buys 55 gallon drums of pentrating lubricant. These drums are expensive. The weight of a drum should be 400 pounds. As a new engineer you have been asked to use your Six Sigma Green Beit to determine if these barrels really weigh 400 pounds. Your company knows statistics and has asked you to use a hypothesis test at the 5% level of significance. You select 9 barreis at random and weigh. You find the average weight of the barrels to be 398 pounds with a standard deviation of 22 pounds. Answer the following Your null hypothesis is equal to what? (no decimals) What is the hypothesis test? (greater than or less than) What is your sample size? (no decimal) What is your sample mean? (no decimal) What is your sample standard deviation? (one decimal) What is your test statistic (T test? two decimais) What is your crntical value? (two decimaln) What is your p-value? (wo decimals) What is your conclusion? (reject or fail to…
What is the level of significance? State the Null and alternative hypotheses. Will you use a left field, right tailed, or two tailed test? Identify the sampling distribution you were used and explain the rationale for your choice what is the value of the sample test statistic? Find or estimate the P value. Will you reject or fail to reject the null hypothesis? State your conclusion in the context of the application. A system specialist has studied the workflow of clerks all doing the same inventory work. Based on the study, she designed a new workflow layout for the inventory system. To compare average product for the old and new methods, a random sample of six clerks was used. The average production rate ( Number of inventory items process per shift) For each clerk was measured both before and after the new system is introduced. The results are shown below. Test the claim that our new system increases the main number of items process per shift. Assume that both distributions or mound…
Employees of MNM Corporation are about to undergo a retraining program. Management is trying to determine the best of three programs. They believe that the effectiveness of the programs may be influenced by gender. To account for the potential differences due to program, gender and interaction, a factorial experiment was designed. Use the following data and the ANOVA output. Program Type Program 1 Male Female 320 380 240 300 Program 2 160 240 180 210 Program 3 240 360 290 380 Anova: Two-Factor With Replication ANOVA Source of Variation P-value F crit SS df MS F Program 36150 18075 12.76 0.0069 5.1433 Gender 16133 1 16133 11.39 0.0150 5.9874 Interaction 1517 2 758 0.54 0.6111 5.1433 Within (Error) 8500 6. 1417 Total 62300 11
(a) State the null hypothesis H0 and the alternative hypothesis H1 . H0: H1: (b) Determine the type of test statistic to use. ▼(Choose one) (c) Find the value of the test statistic. (Round to three or more decimal places.) (d) Find the p-value. (Round to three or more decimal places.) (e) Can we support the claim that the mean completion time of Fundash is not equal to the mean completion time of Coolsprint? Yes No
What is the result of the chi square test of independence given in the SPSS output (test statistic, p-value)? (Hint: I have placed a green box around the correct row in the chi-square test table.) What does the chi square test statistic tell you about the association between one’s level of education and one’s level of disagreement with the statement (assume alpha=0.05), and what does it not tell you? test statistic: p-value: Conclusions:
What type of hypothesis test should be performed? Ex: Left-tailed z-test, Two-tailed z-test, Paired t-test, or Unpaired t-test What is the test statistic? Ex: 0.123 What is the number of degrees of freedom? Ex: 25 Does sufficient evidence exist to support the claim that the voltage of the batteries made by the two manufacturers is different at the α=0.05 significance level? Ex: yes or no
Takeout Food A magazine article reported that 14% of adults buy takeout food every day. A fast-food restaurant owner surveyed 180 customers and found that 31 said that they purchased takeout food every day. At a=0.01, is there evidence to believe the article's claim? Use the critical value method with tables. Part 1 of 5 (a) State the hypotheses and identify the claim. This hy is a two-tailed V test. Part (b th e critical vaiue, separate them with co Critic Part: 2 / 5 Part 3 of 5 (c) Compute the test value. Always round z score values to at least two decimal places. z=

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